Network Access Control (NAC) restricts access to programs and functions on a private network. Authentication is the most common approach, with administrators setting up credentials and access rights. Additional security measures include firewalls, spyware detection, and virus protection. Software packages are available for customizable security options.
Network Access Control or NAC is one of the strategies employed to enhance the security protocols associated with a private or proprietary network. This is achieved by setting restrictions on the ability to access various programs and functions available on the network. Creating the necessary permissions to allow access to a given database, software, or function on the network remains under the control of a network administrator or other persons granted that level of management by the administrator.
There are several common ways to gain network access control. The most common approach is to set up a process for authenticating every valid user for the network. This can be achieved using a simple username and password combination or requesting additional permissions, such as a test question or the correct identification of a picture associated with your login credentials.
Typically, the administrator sets up the credential structure, although users may or may not be granted the privilege to change passwords from time to time. This layer of network admission control (which is also identified as NAC) is usually the key tool for making sure a network is secure. However, it is rarely the only security measure used.
In addition to setting up login credentials and procedures, controlling access to the network usually also involves setting up rights and privileges associated with each user. For example, salespeople may have access rights to a general sales database, but are limited to the type of information that can be accessed and viewed from the accounting software program that also resides on the network access server or NAS. Privileges are generally determined based on the perimeters of the job or position held by each user. However, administrators can grant users additional rights and privileges if needed.
Other tools help provide general improvements to these basic network access control protocols. Adding a firewall can help minimize attacks from outside your network. Likewise, the presence of spyware detection programs and virus protection software can also be of great help if users use Internet access on a regular basis.
While a network administrator can purchase and load individual tools to assist in network access control, several vendors now offer software packages that include a wide range of different network access control features and options. Many of the packages allow the administrator to choose from the available options, making it possible to customize the type and level of network security required.
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